The freshman lawmaker, also the youngest woman ever elected to Congress, presided over "special orders" or brief speeches given by House members that often highlight special concerns to their districts, according to Reuters.

Ocasio-Cortez, 29, tweeted that her time in the chair reminded her that her congressional tenure is a "sacred privilege."

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"Today I presided over the House floor for the first time," she wrote. "Every day here is a sacred privilege + responsibility entrusted to me by my community. I never forget that, and moments like these drive it home."

"Thank you to the people of NY14 + beyond. This House belongs to all of us," she added.

Today I presided over the House floor for the first time.

Every day here is a sacred privilege + responsibility entrusted to me by my community. I never forget that, and moments like these drive it home.